Available in aluminum or SS, single-piece beam coupling has multiple spiral cuts to accommodate angular and parallel misalignment, and axial motion. It comes in 20 sizes with ODs as small as 3/8 in. and bores as small as 3/32 in. Offered in 7 sizes of set screw or clamp style hubs, Oldham couplings comprise 2 aluminum hubs with drive tenons that mate with floating center member, and come in ODs from 1/2 in. with bores from 1/8 in.